lunar month

noun

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Origin of lunar month

First recorded in 1585–95

Words nearby lunar month

lunar day, lunar distance, lunar eclipse, lunar excursion module, lunar module, lunar month, lunar orbiter, lunar rainbow, lunar rover, lunar year, lunarian

Definition for lunar-month (2 of 2)

month

[ muhnth ]

/ mʌnθ /

noun

Also called calendar month. any of the twelve parts, as January or February, into which the calendar year is divided.

the time from any day of one calendar month to the corresponding day of the next.

a period of four weeks or 30 days.

Also called solar month. one-twelfth of a solar or tropical year.

Also called lunar month. the period of a complete revolution of the moon around the earth, as the period between successive new moons (synodic month), equal to 29.531 days, or the period between successive conjunctions with a star (sidereal month), equal to 27.322 days, or the period between successive perigees (anomalistic month), equal to 27.555 days, or the period between successive similar nodes (nodical month or draconic month), equal to 27.212 days.

an unusually long period of time of indefinite length: I haven't seen him for months.

Origin of month

before 900; Middle English; Old English mōnath; cognate with Old High German mānōd, Old Norse mānathr. See moon

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for lunar-month (1 of 2)

lunar month

noun

another name for synodic month See month (def. 6)

British Dictionary definitions for lunar-month (2 of 2)

month

/ (mʌnθ) /

noun

one of the twelve divisions (calendar months) of the calendar year

a period of time extending from one date to a corresponding date in the next calendar month

a period of four weeks or of 30 days

the period of time (tropical month) taken by the moon to return to the same longitude after one complete revolution around the earth; 27.321 58 days (approximately 27 days, 7 hours, 43 minutes, 4.5 seconds)

the period of time (sidereal month) taken by the moon to make one complete revolution around the earth, measured between two successive conjunctions with a distant star; 27.321 66 days (approximately 27 days, 7 hours, 43 minutes, 11 seconds)

Also called: lunation the period of time (lunar or synodic month) taken by the moon to make one complete revolution around the earth, measured between two successive new moons; 29.530 59 days (approximately 29 days, 12 hours, 44 minutes, 3 seconds)

a month of Sundays informal a long unspecified period

Other words from month

Related adjective: mensal

Word Origin for month

Old English mōnath; related to Old High German mānōd, Old Norse mānathr; compare Gothic mena moon

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for lunar-month

lunar month

The average time between successive occurrences of the same phase of the Moon, equal to approximately 29 days, 12 hours, 44 minutes. Depending on the lunar calendar being used, a lunar month can begin with the new moon or the full moon. Also called lunation synodic month♦ A period of 12 lunar months is a lunar year.

Idioms and Phrases with lunar-month

month

In addition to the idiom beginning with month

month of Sundays, a

also see:

by the day (month)
(for months) on end